Resolving PHP Memory Allocation Errors and Custom php.ini Configuration Print

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With the growing complexity of modern web applications, efficiently managing memory allocation in your cPanel web hosting environment is more important than ever. This article has been updated to provide guidance on resolving memory allocation errors in PHP 5.6 and the latest PHP versions. We'll walk you through the process of creating a custom php.ini file to fine-tune your PHP settings, adhering to the latest industry best practices.

Understanding the Error

A common memory allocation error you might face would look something like:

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 3840 bytes) in ...

In this example, the PHP script exhausted the default 32MB memory limit. The server sets this limit to ensure that no single script hogs all the server resources, which could lead to performance issues or even server crashes.

Steps to Resolve Memory Allocation Errors

Calculate the Additional Memory Required

The error message will indicate how much additional memory the script attempted to allocate. Round this number to the nearest megabyte for easier calculations.

Create or Modify the php.ini file

  1. Locate the Directory: Go to the directory where the problematic script is installed.

  2. Create/Edit php.ini: If a php.ini file is not present, create one. If it exists, open it for editing.

  3. Update Memory Limit: Include or modify the following line to set your new memory limit:


  1. This sets the memory limit to 128MB. Adjust this as necessary, but avoid setting an excessively high limit, as this could affect server performance.

Include Additional Extensions If Required

If your PHP scripts require additional extensions, include those lines in the php.ini file as well:

memory_limit = 128M

Validate Changes

Once you've saved your php.ini file, you may need to restart your web server for the changes to take effect.

# For Apache
service httpd restart

# For Nginx
service nginx restart

Additional Notes

  • Shared hosting users are usually restricted by a system-wide memory limit, generally between 110MB and 120MB.
  • For specific queries or requirements beyond 100MB, it's recommended to open a support ticket at


Efficient memory allocation is crucial for the optimal performance of your web applications. This updated guide should help you fine-tune these settings in PHP 5.6 and later versions. If you encounter further technical issues, you may refer to our knowledge base or submit a support ticket for specialized assistance.

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